Metal alloy.



EDWARD SMITH, OF LONDON, ENGLAND.

METAL ALLOY.

No Drawing.

Specification of Letters Patent.

Application filed January 30, 1914. Serial No. 815,539.

Patented Oct. 20, 1914.

To all whom it may concern:

Be it known that I, EDWARD SMITH, subject of the King of Great Britain and Ireland, residing at 17 Richmond Terrace, Claps ham road, London, S. W., in the county of London, England, gentleman, have invented new and useful Improvements in Metal Alloys of which the following is a specification.

My invention relates to a white metal alloy of high luster, capable of taking a brilliant polish and closely resembling silver in. appearance. It is particularly useful for m'aking articles which are to be silver plated and may even be used instead of silver as it closely resembles this metal and is little affected by atmospheric conditions.

According to my invention the metal alloy is formed by mixing or alloying copper nickel, zinc, tin and lead in the requlred proportions and in the manner hereafter described. The proportions in which I prefer to mix the metals are Copper, 70.17% 40 lbs.

Nickel, 14.91% 8% lbs. Zinc, 8.77% 5 lbs. Tin, 4.38% 2% lbs. Lead, 1.75% 1 lb.

Total 57 lbs.

The process according to which the above constituents are mixed to form the alloy is as follows :Th e nickel which is referably in the granulated form .is placed- 1n a suita-, ble crucible or the like together with a suit-' der of the copper may be added altogether.

The zinc or spelter is now added by quickly v plunging same beneath the surface of the molten mixture which is immediately stirred rapidly until completely melted or dissolved. Finally the lead and tin are added together while liquid and the whole mixture is well stirred. The whole mixture is brought to a suitable temperature which is about 1700 F ahr. and poured into molds to form ingots. When these ingots are remelted for further use a temperature of 14:00 Fahr. should not be exceeded.

The resulting compound is a white lustrous alloy closely resembling silver in appearance and capable of being readily cast, rolled, spun, beaten, stamped or otherwise worked into useful articles.

If desired the proportions may be slightly modified to vary the properties of the resultant alloy. The zinc or spelter helps to cheapen and whiten the allo the tin to toughen same and the lead gives ductility. Other materials having the essential constituents of-white glass may be used as a flux.

What I claim as my invention and desire to secure by Letters Patent are 1. A white metal alloy consisting of cop- .per 40, nickel 8%, zinc 5, tin 2% and lead 1.

2. The process of preparing a white metal alloy by mixing granulated nlckel and a flux consisting of silica in a crucible and heating until molten, then adding half the requis1te quantit of copper gradually and when. mixed ad ing the rest of thecopper in bulk, then adding the zinc and finally adding the tin and lead together.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

EDWARD SMITH. Witnesses:

FRANK W. PATTrsoN, COLIN D. McOREDDm. 

